OBD Guide
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B1647

Lost Communication With Side Satellite Sensor Bus Left

B1647 is an OBD-II diagnostic trouble code meaning: Lost Communication With Side Satellite Sensor Bus Left. Common causes: open or short circuit in wiring harness, left side airbag sensor malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • SRS/Airbag light is on
  • Restraint system does not activate in a side impact
  • Error B1647 in fault memory

Causes

  • Open or short circuit in wiring harness
  • Left side airbag sensor malfunction
  • Problems with the SRS control unit
  • Corrosion of contacts or connectors

How to Fix

  1. Check the integrity of the wiring harness to the left side sensor
  2. Inspect connectors and contacts for corrosion or damage
  3. Check sensor resistance (must meet specification)
  4. If necessary, replace the sensor or wiring harness
  5. Clear the error and check if it comes back

Related codes

B1648B1650B1000

FAQ

What does the B1647 code mean?

B1647 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Side Satellite Sensor Bus Left

What causes a B1647 error code?

The most common causes of B1647 include: Open or short circuit in wiring harness; Left side airbag sensor malfunction; Problems with the SRS control unit; Corrosion of contacts or connectors.

How do I fix a B1647 diagnostic trouble code?

To fix B1647: Check the integrity of the wiring harness to the left side sensor. Inspect connectors and contacts for corrosion or damage. Check sensor resistance (must meet specification). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1647?

Limited driving only, diagnose soon

How much does it cost to fix B1647?

The estimated repair cost for B1647 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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